Title :
Miniature magnetic resonance coils for wide wireless power transfer applications
Author :
In-Kui Cho ; Seong-Min Kim ; Jeong-Ik Moon ; Jae-Hun Yoon ; Woo-Jin Byun ; Hyung-Do Choi
Author_Institution :
Radio & Broadcasting Res. Div., ETRI, Daejeon, South Korea
Abstract :
A simple miniature magnetic resonance coil for wide wireless power transfer applications is presented. The proposed resonance coils are derived from a new two layered spiral structure designed through the analysis of input impedance, transmission coefficient and direction of coil current. The measured resonance frequency and efficiency are 1.8 MHz and 82.5% at normalized distance 0.68(20.4 cm) and the diameter size of the spiral coil is 30 cm (1.8λ/1000). Their performance is compared with previously reported result of helical and spiral coils.
Keywords :
coils; inductive power transmission; magnetic resonance; coil current direction; helical coils; input impedance analysis; miniature magnetic resonance coils; resonance frequency; spiral coils; transmission coefficient; two layered spiral structure; wide wireless power transfer applications; Coils; Frequency measurement; Inductance; Magnetic resonance; Spirals; Wireless communication; Frequency separation; Magnetic resonance; Resonance coil; Wireless power transmission;
Conference_Titel :
Antenna Measurements & Applications (CAMA), 2014 IEEE Conference on
Conference_Location :
Antibes Juan-les-Pins
DOI :
10.1109/CAMA.2014.7003365
